Consistency of Relevant Cosmological Deformations on all Scales
High Energy Physics - Theory
2015-03-19 v1 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
Using cosmological perturbation theory we show that the most relevant defor- mation of gravity is consistent at the linear level. In particular, we prove the absence of uni- tarity violating negative norm states in the weak coupling regime from sub- to super-Hubble scales. This demonstrates that the recently proposed classical self-protection mechanism of deformed gravity extends to the entire kinematical domain.
Keywords
Cite
@article{arxiv.1104.2534,
title = {Consistency of Relevant Cosmological Deformations on all Scales},
author = {Felix Berkhahn and Dennis D. Dietrich and Stefan Hofmann},
journal= {arXiv preprint arXiv:1104.2534},
year = {2015}
}
Comments
22 pages, 4 figures